Core for centrifugal pipe molds



June zs, 1925. 1,542,810

, T. P. ANTHONY CORE FOR CEN'IRIFUGAL PIlE MOLDS Filed Sept. 9, 1924 2 Sheets-Sheet 1 June 23, 1925.

- T. P. ANTHONY CORE FOR CENTRIFUGAL PIPE MOLDS Filed Sept. 9. 1924 2' Sheets-Sheet 2 M A w WRN W/ N x Z W w f w w m a R 7 W M N V y g o E w N R Tn 3 P MM W 1 \N partsin the Patented June 23, 1925.

UNITED STATES;

PATENT OFFICE.

THOM'AS PEACOCK ANTHONY, 0F EDGEWATER PARK, NEW JERSEY, ASSIG-NOR T0 UNITED STATES CAST IRON PIPE & FOUNDRY COMPANY, OF BURLINGTON, NEW- JERSEY, A CORPORATION OF NEW JERSEY.

CORE FOR CENTRIFUGAL PIPE MOLDS.

Application filed September 9, 1924. Serial No. 736,688.

To all whom it may concern:

Be it known that I, THoMAs PEAOOGK ANTHONY, a citizen of the United States of America, and resident of Edgewater Park, Burlington County, State of New Jersey, have invented a certain new and useful Improvement in Cores for Centrifugal Pipe Molds, of which the following is a true and exact description, reference being had to the accompanying drawings, which form part of the application.

My invention relates to centrifugal pipe molds and has for its object to provide a segmental removable core for forming the bell ends of pipes which can be removed from the casting without destroying the core andis therefore capable of re-use. The nature of my invention will be best understood as described in connection with the drawings in which I have illustrated a core device constructed in accordance with my invention and in which Figure 1 is an end view of a centrifugal pipe mold with my segmental core device secured to the end of the mold and with its osition they occupy when a casting is ma c.

Figure 2 is a cross section on the line 22 of Fig. 1.

Figure 3, a fragmentary section onthe line 33 of Fig. 1.

Figure 4 is a sectional View similar to that of Fig. 2, but showing the core segments turned inward into the position they occupy or may occupy when the core is withdrawn from the casting, and

Figure 5 is an end view of the mold and core device in the position of the parts shown in Fig. 4.

A is the mold, here shown as a metal mold, and provided with a flanged outer face indicated at A. The expanded bell portion of the'mold is indicated at A and the mold is formed on the seating surface indicated at A and A in which the ring, to be described, fits. fianged end A of the mold is an annular ring indicated at A in which, at convenient points, are formed wedge openings indicated at A". B is an annular ring having a shoulder B which fits on the seating surface A and extends inward in the mold to form the end of the mold against which the Extending outward from thebell end of the pipe is cast. The ring also has a seating surface B which fits against the tapered seat A of the mold and its inner periphery B forms a shoulder against which the segments of the segmental core rest when they are in operative position in the mold. On its outer face the ring B carries lugs B which support hinged pins C. Pivoted on the pins C are the hinged arms E, E, of the core segments proper, indicated at E and E These segments, when the ring is secured in the end of the mold and the segments abut through their surface E with the abutting shoulder B of the ring, form the core of the mold with their end surfaces 0 and e abutting against each other, as shown in Fig. 1, and to enable the segments to return inward into the mold so that their projecting lugs, indicated at E", will hold the casting, the segments are made of wedge shape with the segments E having the edges of the wedge diverging toward the center of the mold and the adjoining segments E having their abutting edges abutting toward the center of the mold asindicated at e and c As shown, the ring B is secured inits seat at the end of the mold by means of the wedges D fitting in the wedge holes A of the projecting lug A.

In operation, the ring B is secured in the end of the mold with the segments E, E, extending into the mold. The mold is ro tated at considerable speed with the result that the centrifugal force naturally brings the segments into contact with the shoulder B 8 of the ring, into the position illustrated in Figs. 1 and 2. Metal is poured into the rotating mold and thrust into the space between the bell mouth A of the mold and the core made up of the segments E and E 2 ings can then be withdrawn from the mold and my core devices are inserted for a fresh casting.

Of course, the ring B and the attached core segments can be Withdrawn from the mold together with the casting and separated from the casting after withdrawal.

The core segments may, and ordinarily, will be made of metal but obviously any refractory and fairly strong material can be used in place of metal.

My invention is in the nature of an improvement on the collapsible core invention of Edward Hering described and claimed in his application filed September 6, 1924, Serial No. 736,221.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A segmental removable core for a centrifugal pipe mold comprising in combination a ring adapted to be removably secured to the end of a mold and a series of core segments separately hinged to the ring adapted to fit together in the mold to form a core and to be turned inwardly in the mold to clear the casting.

2. A segmental removable core for a centrifugal pipe mold comprising in combination a ring adapted to be removably secured to the end of a mold and a series of core segments separately hinged to the ring adapted to fit together in the mold to form a core and formed with wedge shaped contacting ends which in alternate segments diverge and converge towards the inside of the core.

3. A segmental removable core for a centrifugal pipe mold comprising in combination a ring adapted to be removably secured to the end of a mold and having an aligning shoulder with which the core segments contact when in operative position and a series of core segments hinged to the ring adapted to fit together in the mold to form a core and to be turned inwardly in the mold to clear the casting.

THOMAS PEACOCK ANTHONY. 

